Off-Spec Methanol Cargoes
An off-spec results on a methanol cargo is rarely the end of a dispute. It’s the start of one.
For P&I Clubs, owners, charterers, insurers, and legal teams, the lab certificate is only the opening question. The real exposure sits in what happens next – because a failed test doesn’t tell you where in the supply chain the cargo went wrong, or who is likely to bear the cost of it.
The test tells you what went wrong
Methanol’s specification parameters each point to a different category of problem:
- PTT/UVT Failures: may indicate residues, inadequate cleaning, or cross-contamination.
- Water: methanol is hygroscopic; atmospheric exposure and water ingress are key risk factors.
- Chloride: elevated levels may point to water ingress, residues, transfer system, or other external sources.
- Acidity: may indicate contamination or carryover from previous cargoes or cleaning materials.
- Hydrocarbons/Oil: possible sources include shore or vessel lines, previous cargo residues, cross-contamination, or handling equipment.
Each of these is diagnostic. None of them, on its own, tells you where in the chain the contamination was introduced.
It doesn’t tell you where
An off-spec result at discharge can look identical whether the cargo was:
- Pre-existing: already out of specification before it reached the load terminal.
- Introduced during transfer: via the shore tank, shore pipeline, or loading process.
- Vessel-related: tank residues, inadequate cleaning, or onboard handling equipment.
This is the question that P&I Clubs, owners, and insurers are left to resolve, often under time pressure and often with incomplete information. It’s also increasingly the question the courts are asking – recent case law has turned on precisely this kind of causation and timing analysis for petrochemical cargoes.
Causation is the real question
A defensible answer requires more than a re-test. It requires evaluating, together:
- Available samples.
- Cargo history.
- Sampling chronology.
- Targeted chemical analysis.
- Operational records.
Brookes Bell’s Fuel Chemists work with whatever evidence exists – not a hypothetical ideal evidence trail – to build the clearest, most defensible picture available of whether contamination was pre-existing, transfer-related, or vessel-related. That distinction can materially change where liability, and cover, are likely to sit.
Why Brookes Bell?
Since 1903, Brookes Bell has supported the maritime and energy industries through casualty investigation, forensic analysis, and technical dispute resolution.
Our Fuel Chemists don’t work in isolation – they sit alongside Master Mariners, Marine Engineers, Cargo Scientists, and Naval Architects, giving you access to a full multidisciplinary view through a single point of contact, exactly when a dispute needs more than one kind of expertise.
Our chemists are regularly instructed to give expert evidence in exactly these disputes, which shapes how every investigation is conducted from the outset: methodically, and in a form that holds up under scrutiny.
Speak to our Fuel Chemists
Whether you’re assessing an active claim or want to understand your exposure before one arises, our Fuel Chemists can help you build a clear, defensible answer to where an off-spec methanol cargo went wrong.
Contact us now for off-spec methanol cargo support.